another pure substance, compounds contain atoms from two or more elements chemically bonded. when atoms…
another pure substance, compounds contain atoms from two or more elements chemically bonded. when atoms bond, they cannot be separated physically. compounds may have different properties than the elements theyre made of. water, for example, is a compound formed from hydrogen and oxygen. water is a liquid at room temperature, while oxygen and hydrogen are both gases. which of the following best describes compounds? choose one option a they can only be separated chemically. b they are always liquid at room temperature. c they contain the atoms of just one element. d they have the same properties as their elements.
Answer
Brief Explanations:
- Option A: The text states "When atoms bond, they cannot be separated physically", which implies that chemical separation is needed. This option aligns with the description of compounds in the text.
- Option B: The example of water (a compound) being liquid at room - temperature is just one example. There is no indication that all compounds are liquid at room temperature.
- Option C: The text clearly says "compounds contain atoms from two or more elements", so this option is incorrect.
- Option D: The text mentions "Compounds may have different properties than the elements they're made of", so this option is wrong.
Answer:
A. They can only be separated chemically.